Question for Beth- Memory.

I had a question for Beth. So I was daydreaming (shocker I know) and I remembered this story I heard a long time ago. Mind you the memory is so patchy I'm not even sure if its a real memory.

The memory is of a book on tape we listened to while (I think) we were driving up to Zion National Park. This was a looong time ago- it was that time I got all sick and went home early with strep throat.

Anyway... I remember that the story was really weird, but I liked it alot. It was about this kid that goes to this other world. Everything there is all fun and awesome at first, until he starts realising things gone amiss. I think there is holidays alot. I remember there was this fish pond. Then later he finds out that the fish were really kids that turned into to fish. At the end the house goes all crazy and evil.

Ring any bells? Its really bugging me alot. Don't feel bad if you're clueless though, I'm not even sure if it was in your car I heard the story.